[usb-driver] / parport.c

#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <linux/parport.h>
#include <linux/ppdev.h>
#include "usb-driver.h"
#include "parport.h"

static int parportfd = -1;

int parport_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
	int ret = 0;
	int i;
	unsigned long port;
	unsigned char val;
	static unsigned char last_pp_write = 0;

	if (parportfd < 0)
		return ret;

	if (ioctl(parportfd, PPCLAIM) == -1)
		return -1;

	for (i = 0; i < num; i++) {
		DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
				(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
				tr[i].fAutoinc, tr[i].dwOptions);

		port = (unsigned long)tr[i].dwPort;
		val = tr[i].Data.Byte;

#ifdef DEBUG
		if (tr[i].cmdTrans == 13)
			DPRINTF("write byte: %d\n", val);
#endif

		if (port == ppbase + PP_DATA) {
			DPRINTF("data port\n");
			switch(tr[i].cmdTrans) {
				case PP_READ:
					ret = 0; /* We don't support reading of the data port */
					break;

				case PP_WRITE:
					ret = ioctl(parportfd, PPWDATA, &val);
					last_pp_write = val;
					break;

				default:
					fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
					ret = -1;
					break;
			}
		} else if (port == ppbase + PP_STATUS) {
			DPRINTF("status port (last write: %d)\n", last_pp_write);
			switch(tr[i].cmdTrans) {
				case PP_READ:
					ret = ioctl(parportfd, PPRSTATUS, &val);
#ifdef FORCE_PC3_IDENT
					val &= 0x5f;
					if (last_pp_write & 0x40)
						val |= 0x20;
					else
						val |= 0x80;
#endif
					break;

				case PP_WRITE:
					ret = 0; /* Status Port is readonly */
					break;

				default:
					fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
					ret = -1;
					break;
			}
		} else if (port == ppbase + PP_CONTROL) {
			DPRINTF("control port\n");
			switch(tr[i].cmdTrans) {
				case PP_READ:
					ret = ioctl(parportfd, PPRCONTROL, &val);
					break;

				case PP_WRITE:
					ret = ioctl(parportfd, PPWCONTROL, &val);
					break;

				default:
					fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
					ret = -1;
					break;
			}
		} else if ((port == ecpbase + PP_ECP_CFGA) && ecpbase) {
			DPRINTF("ECP_CFGA port\n");
		} else if ((port == ecpbase + PP_ECP_CFGB) && ecpbase) {
			DPRINTF("ECP_CFGB port\n");
		} else if ((port == ecpbase + PP_ECP_ECR) && ecpbase) {
			DPRINTF("ECP_ECR port\n");
		} else {
			DPRINTF("access to unsupported address range!\n");
			ret = 0;
		}

		tr[i].Data.Byte = val;

		DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
				(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
				tr[i].fAutoinc, tr[i].dwOptions);
#ifdef DEBUG
		if (tr[i].cmdTrans == 10)
			DPRINTF("read byte: %d\n", tr[i].Data.Byte);
#endif
	}

	ioctl(parportfd, PPRELEASE);

	return ret;
}

int parport_open(int num) {
	char ppdev[32];

	if (parportfd < 0) {
		snprintf(ppdev, sizeof(ppdev), "/dev/parport%u", num);
		DPRINTF("opening %s\n", ppdev);
		parportfd = open(ppdev, O_RDWR|O_EXCL);

		if (parportfd < 0)
			fprintf(stderr,"Can't open %s: %s\n", ppdev, strerror(errno));
	}

	if (parportfd >= 0) {
		int pmode;

		if (ioctl(parportfd, PPCLAIM) == -1)
			return -1;

		pmode = IEEE1284_MODE_COMPAT;
		if (ioctl(parportfd, PPNEGOT, &pmode) == -1)
			return -1;

		ioctl(parportfd, PPRELEASE);
#if 0
		if (cr->Card.dwItems > 1 && cr->Card.Item[1].I.IO.dwAddr) {
			DPRINTF("ECP mode requested\n");
			ecpbase = (unsigned long)cr->Card.Item[1].I.IO.dwAddr;
			/* TODO: Implement ECP mode */
			pmode = IEEE1284_MODE_ECP;

			if (ioctl(parportfd, PPNEGOT, &pmode) == -1) {
				ecpbase = 0;
				pmode = IEEE1284_MODE_COMPAT;
				if (ioctl(parportfd, PPNEGOT, &pmode) == -1)
					return ret;
			}
		}
#endif
	}

	return parportfd;
}

void parport_close(int handle) {
	if (parportfd == handle && parportfd >= 0) {
		ioctl(parportfd, PPRELEASE);
		close(parportfd);
		parportfd = -1;
	}
}
Commit	Line	Data
5e3d963b	1	#include <stdio.h>
	2	#include <fcntl.h>
	3	#include <errno.h>
	4	#include <string.h>
	5	#include <unistd.h>
	6	#include <inttypes.h>
	7	#include <sys/types.h>
	8	#include <sys/ioctl.h>
	9	#include <linux/parport.h>
	10	#include <linux/ppdev.h>
	11	#include "usb-driver.h"
	12	#include "parport.h"
	13
	14	static int parportfd = -1;
	15
25ba7a49	16	int parport_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
5e3d963b	17	int ret = 0;
	18	int i;
	19	unsigned long port;
	20	unsigned char val;
	21	static unsigned char last_pp_write = 0;
	22
cf55ed64 MG	23	if (parportfd < 0)
	24	return ret;
	25
	26	if (ioctl(parportfd, PPCLAIM) == -1)
	27	return -1;
	28
5e3d963b	29	for (i = 0; i < num; i++) {
	30	DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	31	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	32	tr[i].fAutoinc, tr[i].dwOptions);
	33
	34	port = (unsigned long)tr[i].dwPort;
	35	val = tr[i].Data.Byte;
	36
	37	#ifdef DEBUG
	38	if (tr[i].cmdTrans == 13)
	39	DPRINTF("write byte: %d\n", val);
	40	#endif
	41
5e3d963b	42	if (port == ppbase + PP_DATA) {
	43	DPRINTF("data port\n");
	44	switch(tr[i].cmdTrans) {
	45	case PP_READ:
	46	ret = 0; /* We don't support reading of the data port */
	47	break;
	48
	49	case PP_WRITE:
	50	ret = ioctl(parportfd, PPWDATA, &val);
	51	last_pp_write = val;
	52	break;
	53
	54	default:
	55	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	56	ret = -1;
	57	break;
	58	}
	59	} else if (port == ppbase + PP_STATUS) {
	60	DPRINTF("status port (last write: %d)\n", last_pp_write);
	61	switch(tr[i].cmdTrans) {
	62	case PP_READ:
	63	ret = ioctl(parportfd, PPRSTATUS, &val);
	64	#ifdef FORCE_PC3_IDENT
	65	val &= 0x5f;
	66	if (last_pp_write & 0x40)
	67	val \|= 0x20;
	68	else
	69	val \|= 0x80;
	70	#endif
	71	break;
	72
	73	case PP_WRITE:
	74	ret = 0; /* Status Port is readonly */
	75	break;
	76
	77	default:
	78	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	79	ret = -1;
	80	break;
	81	}
	82	} else if (port == ppbase + PP_CONTROL) {
	83	DPRINTF("control port\n");
	84	switch(tr[i].cmdTrans) {
	85	case PP_READ:
	86	ret = ioctl(parportfd, PPRCONTROL, &val);
	87	break;
	88
	89	case PP_WRITE:
	90	ret = ioctl(parportfd, PPWCONTROL, &val);
	91	break;
	92
	93	default:
	94	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	95	ret = -1;
	96	break;
	97	}
	98	} else if ((port == ecpbase + PP_ECP_CFGA) && ecpbase) {
	99	DPRINTF("ECP_CFGA port\n");
	100	} else if ((port == ecpbase + PP_ECP_CFGB) && ecpbase) {
	101	DPRINTF("ECP_CFGB port\n");
	102	} else if ((port == ecpbase + PP_ECP_ECR) && ecpbase) {
	103	DPRINTF("ECP_ECR port\n");
	104	} else {
	105	DPRINTF("access to unsupported address range!\n");
106	ret = 0;
107	}
108
109	tr[i].Data.Byte = val;
110
111	DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
112	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
113	tr[i].fAutoinc, tr[i].dwOptions);
114	#ifdef DEBUG
115	if (tr[i].cmdTrans == 10)
116	DPRINTF("read byte: %d\n", tr[i].Data.Byte);
117	#endif
118	}
119
cf55ed64 MG	120	ioctl(parportfd, PPRELEASE);
cf55ed64 MG	121
5e3d963b	122	return ret;
	123	}
	124
	125	int parport_open(int num) {
	126	char ppdev[32];
	127
	128	if (parportfd < 0) {
	129	snprintf(ppdev, sizeof(ppdev), "/dev/parport%u", num);
	130	DPRINTF("opening %s\n", ppdev);
	131	parportfd = open(ppdev, O_RDWR\|O_EXCL);
	132
	133	if (parportfd < 0)
	134	fprintf(stderr,"Can't open %s: %s\n", ppdev, strerror(errno));
	135	}
	136
	137	if (parportfd >= 0) {
	138	int pmode;
	139
	140	if (ioctl(parportfd, PPCLAIM) == -1)
	141	return -1;
	142
	143	pmode = IEEE1284_MODE_COMPAT;
	144	if (ioctl(parportfd, PPNEGOT, &pmode) == -1)
	145	return -1;
	146
cf55ed64	147	ioctl(parportfd, PPRELEASE);
5e3d963b	148	#if 0
	149	if (cr->Card.dwItems > 1 && cr->Card.Item[1].I.IO.dwAddr) {
	150	DPRINTF("ECP mode requested\n");
	151	ecpbase = (unsigned long)cr->Card.Item[1].I.IO.dwAddr;
	152	/* TODO: Implement ECP mode */
	153	pmode = IEEE1284_MODE_ECP;
	154
	155	if (ioctl(parportfd, PPNEGOT, &pmode) == -1) {
	156	ecpbase = 0;
	157	pmode = IEEE1284_MODE_COMPAT;
	158	if (ioctl(parportfd, PPNEGOT, &pmode) == -1)
	159	return ret;
	160	}
	161	}
	162	#endif
	163	}
	164
	165	return parportfd;
	166	}
	167
	168	void parport_close(int handle) {
	169	if (parportfd == handle && parportfd >= 0) {
	170	ioctl(parportfd, PPRELEASE);
	171	close(parportfd);
	172	parportfd = -1;
	173	}
	174	}